Mersen Surge Trap STXR Series

September 2, 2026

The most popular range in Mersen’s STX series offering, the Surge-Trap® Type 1 STXR meets requirements for UL1449 4th Edition and is ideal for the replacement of obsolete surge arrestors. The STXR Series SPDs feature TPMOV® technology inside, making them the safest product available. With a small, compact design and line or load installation flexibility, the STXR series is the perfect fit for branch panel and/or individual equipment protection.

FEATURES AND BENEFITS:

  • Designed with the industry leading Mersen TPMOV® Technology
  • LED status indicator (ON = Good, OFF = Replace)
  • NEMA 4X enclosure for outdoor or indoor use
  • Fits 3/4″ knockouts with 3′ leads for easy installation
  • Optional mounting bracket for surface mount applications
  • Optional audible alarm and remote dry contacts
  • For use in ANSI/UL Type 1 or 2 SPD installations
  • Up to 10 modes of Protection (L-N, L-L, L-G optional, N-G optional)
  • 5-year warranty

APPROVALS:

  • ANSI/UL 1449 4th Edition, Type 1 SPD, File E210793
  • CSA C22 .2, Type 1 SPD
  • ANSI/IEEE C62 .41 .1, C62 .41 .2, C62 .45
  • UL96A Lightning Protection
  • RoHS Compliant

RATINGS:

  • Volts (Un): 120-600VAC
  • Nominal Discharge Current Rating (In): 10-20kA
  • Surge Capacity (per phase and per mode): 50kA
  • Short-Circuit Current Rating (SCCR): 200kA
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